Improvement in pipe-couplings



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WILLIAM` n. ALFORDAND *.I. II. IIIKIN, or oUYAHoeA FALLS, oHIo.

Letters `Patent No. 99,7 44, dated. .February 15, 1870.

y, IMPROVEMENT 1N PIPELQOUPLINGS.'

The Schedule referred to in these Letters Patent and making part of the same.

To all 'whom it 'may concern: Y

Beit known that we,WILLIAtZI D. ALFoRD and J. H.

Plinius, of Cuyahoga Falls, in the county of Summit,

f clear and exact description of the same, reference being had to the accompanying drawings making a part of this specication, in which--A Figure l represents in perspective the ends of two pipes furnished with our proposed coupling, and

Figure 2 represents a longitudinal section through the t-wo ends of the united pipes, coupled by the device in question.

Similar letters of reference, where they oc,cur in the sepa-rate figures, dentite like parts in both ,of them.

In pipes used for conveying or transmitting heated air or gas, and which are subjected to ,high and then to low temperatures so frequently, the expansion and contraction of the metal causes the joints to become loose and leaky.

The object of our invention is to prevent this loosening ofthe joints. 1 f y liipe-couplings` of many kinds have been devised, but they generally, if not universally, go together and are held together by a third piece of some kind, the fastenings not being cast on the pipesv themselves, so

' as to require no dressing or fitting, or pieces to be looked up and liable to be'mislaid. And even wherea third, or more separate pieces are used, there are projections of some kind on the exteriorl ofthe pipes to be so joined, that are unsightly and liable to injury iu handling or transport-ation.

Hose-couplings have been held together by fastenings or devices castupon the two part-s to be coupled. But the packing of thejoint vvas'to be done by the pressure of the water passing through the hose, and the devices had no means of drawing the pipes tol gether in the'line of their length.

Our invention consists iny uniting pipes that are subjected to `Asudden and frequent expansion and 'contraction by means of'wcdge-shaped projections on one,

Vand shoulders or projections 'upon -the other, for the wedges to take against, so that when'the end of a pipe so furnished is slippedA into the socket or bell of the other, and turned in the direction of its short axis, it

will draw itself, orbe drawn, tight up against its mate or fellow, and be lirmly held there.

To enable others skilled in the art to make and use our invention we will proceed to describe the same with reference to the drawings.

A represents a cast-irou pipe, upon which the oommon socket or bell() is cast, in the usual way. A

In the interior of the bell are cast on an'd with it twolugs a a, that form4 shoulders near the bottom of the bell. i

On the pipe B, that is to be coupled with'A that A, are cast two Wedge-shaped sections, c c, 'at such distance from the end of the pipe as will enable their points to readily take against 'the shoulders of the Vlugs a a, then by turning one or both of the pipes a part oi' a rotation, the twoparts are drawn up tight-ly together.

A packing-ring, e, of any suitable material, may be introduced between; the beaded end t of the pipe B and the bottom of the hell or socket, to close the joint perfectly tight yii" so desired.

The object of the lugs and wedges is to prevent the pipes from being drawn apart by the expansion and contraction of the pipes. y

If the joint is to be packed, it may be done in any of the usual well-known ways of so doing.

Te have described the lugs as cast upon or in the bell-end of the pipe A, and the wedge projections on They may be reversed, but

the end of the pipe B. We prefer to make them as shown.

Having thus fully describedrour invention,

WVha-t we claim therein as new, and desire to se cure by LettersvPatent, isi In combination with the joint or oouplilrgoi` heating-pipes made tight by packing driven into the socket around the inserted end of the pipe, the lugs cast in the bottom o f the socket and upon the end 'ot' the pipe t-o prevent them lrombeing drawnapart,to` .gcther with the space around the pipe in the socket to receive Vthe packing, substantially 'as and for the purpose described.

WM. D. ALFORD.

J. H. PLTKIN. Witnesses: l

CHARLES J. HENSHAW, M. D., j C. P. HUMPHREY. 

